/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file           : usbd_storage_if.c
 * @version        : v1.0_Cube
 * @brief          : Memory management layer.
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2022 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file
 * in the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "usbd_storage_if.h"

/* USER CODE BEGIN INCLUDE */

/* USER CODE END INCLUDE */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
 * @brief Usb device.
 * @{
 */

/** @defgroup USBD_STORAGE
 * @brief Usb mass storage device module
 * @{
 */

/** @defgroup USBD_STORAGE_Private_TypesDefinitions
 * @brief Private types.
 * @{
 */

/* USER CODE BEGIN PRIVATE_TYPES */

/* USER CODE END PRIVATE_TYPES */

/**
 * @}
 */

/** @defgroup USBD_STORAGE_Private_Defines
 * @brief Private defines.
 * @{
 */

#define STORAGE_LUN_NBR 1
#define STORAGE_BLK_NBR 0x80 // 0x10000
#define STORAGE_BLK_SIZ 0x200 // 512

/* USER CODE BEGIN PRIVATE_DEFINES */
/* 64K */
uint8_t buffer[STORAGE_BLK_NBR * STORAGE_BLK_SIZ] = FAT_DATA;

/* USER CODE END PRIVATE_DEFINES */

/**
 * @}
 */

/** @defgroup USBD_STORAGE_Private_Macros
 * @brief Private macros.
 * @{
 */

/* USER CODE BEGIN PRIVATE_MACRO */

/* USER CODE END PRIVATE_MACRO */

/**
 * @}
 */

/** @defgroup USBD_STORAGE_Private_Variables
 * @brief Private variables.
 * @{
 */

/* USER CODE BEGIN INQUIRY_DATA_FS */
/** USB Mass storage Standard Inquiry Data. */
const int8_t STORAGE_Inquirydata_FS[] = {
    /* 36 */

    /* LUN 0 */
    0x00,
    0x80,
    0x02,
    0x02,
    (STANDARD_INQUIRY_DATA_LEN - 5),
    0x00,
    0x00,
    0x00,
    'S', 'T', 'M', ' ', ' ', ' ', ' ', ' ', /* Manufacturer : 8 bytes */
    'P', 'r', 'o', 'd', 'u', 'c', 't', ' ', /* Product      : 16 Bytes */
    ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
    '0', '.', '0', '1' /* Version      : 4 Bytes */
};
/* USER CODE END INQUIRY_DATA_FS */

/* USER CODE BEGIN PRIVATE_VARIABLES */

/* USER CODE END PRIVATE_VARIABLES */

/**
 * @}
 */

/** @defgroup USBD_STORAGE_Exported_Variables
 * @brief Public variables.
 * @{
 */

extern USBD_HandleTypeDef hUsbDeviceFS;

/* USER CODE BEGIN EXPORTED_VARIABLES */

/* USER CODE END EXPORTED_VARIABLES */

/**
 * @}
 */

/** @defgroup USBD_STORAGE_Private_FunctionPrototypes
 * @brief Private functions declaration.
 * @{
 */

static int8_t STORAGE_Init_FS(uint8_t lun);
static int8_t STORAGE_GetCapacity_FS(uint8_t lun, uint32_t *block_num, uint16_t *block_size);
static int8_t STORAGE_IsReady_FS(uint8_t lun);
static int8_t STORAGE_IsWriteProtected_FS(uint8_t lun);
static int8_t STORAGE_Read_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);
static int8_t STORAGE_Write_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);
static int8_t STORAGE_GetMaxLun_FS(void);

/* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */

/* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */

/**
 * @}
 */

USBD_StorageTypeDef USBD_Storage_Interface_fops_FS =
    {
        STORAGE_Init_FS,
        STORAGE_GetCapacity_FS,
        STORAGE_IsReady_FS,
        STORAGE_IsWriteProtected_FS,
        STORAGE_Read_FS,
        STORAGE_Write_FS,
        STORAGE_GetMaxLun_FS,
        (int8_t *)STORAGE_Inquirydata_FS};

/* Private functions ---------------------------------------------------------*/
/**
 * @brief  Initializes over USB FS IP
 * @param  lun:
 * @retval USBD_OK if all operations are OK else USBD_FAIL
 */
int8_t STORAGE_Init_FS(uint8_t lun)
{
  /* USER CODE BEGIN 2 */
  return (USBD_OK);
  /* USER CODE END 2 */
}

/**
 * @brief  .
 * @param  lun: .
 * @param  block_num: .
 * @param  block_size: .
 * @retval USBD_OK if all operations are OK else USBD_FAIL
 */
int8_t STORAGE_GetCapacity_FS(uint8_t lun, uint32_t *block_num, uint16_t *block_size)
{
  /* USER CODE BEGIN 3 */
  *block_num = STORAGE_BLK_NBR;
  *block_size = STORAGE_BLK_SIZ;
  return (USBD_OK);
  /* USER CODE END 3 */
}

/**
 * @brief  .
 * @param  lun: .
 * @retval USBD_OK if all operations are OK else USBD_FAIL
 */
int8_t STORAGE_IsReady_FS(uint8_t lun)
{
  /* USER CODE BEGIN 4 */
  return (USBD_OK);
  /* USER CODE END 4 */
}

/**
 * @brief  .
 * @param  lun: .
 * @retval USBD_OK if all operations are OK else USBD_FAIL
 */
int8_t STORAGE_IsWriteProtected_FS(uint8_t lun)
{
  /* USER CODE BEGIN 5 */
  return (USBD_OK);
  /* USER CODE END 5 */
}

/**
 * @brief  .
 * @param  lun: .
 * @retval USBD_OK if all operations are OK else USBD_FAIL
 */
int8_t STORAGE_Read_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
  /* USER CODE BEGIN 6 */
  uint32_t len = blk_len * STORAGE_BLK_SIZ;
  uint32_t addr = blk_addr * STORAGE_BLK_SIZ;

  printf("[%s] %d: addr=%d, len=%d\r\n", __func__, __LINE__, addr, len);
  memcpy(buf, buffer + addr, len);
  return (USBD_OK);
  /* USER CODE END 6 */
}

/**
 * @brief  .
 * @param  lun: .
 * @retval USBD_OK if all operations are OK else USBD_FAIL
 */
int8_t STORAGE_Write_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
  /* USER CODE BEGIN 7 */
  uint32_t len = blk_len * STORAGE_BLK_SIZ;
  uint32_t addr = blk_addr * STORAGE_BLK_SIZ;

  printf("[%s] %d: addr=%d, len=%d\r\n", __func__, __LINE__, addr, len);
  // array_printf(buf, len);

  // 1、抓取到22016，开始写flash
  // 2、抓取到7680，代表写入完成

  static uint32_t addr_bak = 0;
  static int flash_eraser_flag = 0;
  static uint32_t flash_addr = 0x08010000;
  extern int boot_flag;
  
  if (addr > addr_bak)
  {
    addr_bak = addr;

    if (addr_bak >= 22016)
    {
      if (flash_eraser_flag == 0)
      {
        flash_eraser_flag = 1;
        flash_port_erase(0x08010000, ((128 + 64) * 1024));
        printf("[%s] %d: eraser done\r\n", __func__, __LINE__);
      }

      printf("[%s] %d: write addr:0x%x\r\n", __func__, __LINE__, flash_addr);
      flash_port_write(flash_addr, buf, len);
      flash_addr += len;
    }
  }

  if ((addr == 7680) && (addr_bak > 22016))
  {
    boot_flag = 1;
    printf("[%s] %d: update done!!!\r\n", __func__, __LINE__);
  }

  memcpy(buffer + addr, buf, len);
  return (USBD_OK);
  /* USER CODE END 7 */
}

/**
 * @brief  .
 * @param  None
 * @retval .
 */
int8_t STORAGE_GetMaxLun_FS(void)
{
  /* USER CODE BEGIN 8 */
  return (STORAGE_LUN_NBR - 1);
  /* USER CODE END 8 */
}

/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */

/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */

/**
 * @}
 */

/**
 * @}
 */
